JP2006347918A - Cationic cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cationic cosmetic imparting flexibility to hairs without giving stiffness on using it and maintaining flexibility without giving a frictional feeling to the hairs after washing. <P>SOLUTION: This cationic cosmetic contains a base agent polymer obtained by polymerizing a monomer composition containing a monomer expressed by formula (I) [wherein, R<SP>1</SP>is H or methyl; R<SP>2</SP>is a 1-4C alkylene; R<SP>3</SP>, R<SP>4</SP>are each independently H or a 1-4C alkyl; R<SP>5</SP>is an organic group; A is O or -NH-; and B<SP>-</SP>is an anion] as a main component. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cationic cosmetic. More specifically, the present invention relates to cationic cosmetics that can be suitably used as body shampoos, body rinses, rinses, creams, treatments, etc., as well as cosmetics for hair such as shampoos, hair rinses, hair conditioners, and hair treatments.

  Generally, in hair care cosmetics such as hair conditioners, cationic polymers are used to adsorb cationic groups to the hair surface because the hair is negatively charged. (For example, refer to Patent Documents 1 to 3). However, these cationic polymers have the disadvantage that the film formed from the cationic polymer is rigid, and the hair is irritated when used on the hair.

  In addition, a base using dimethyldiallylammonium chloride-acrylamide copolymer or cationized cellulose as a cationic polymer has been proposed (see, for example, Patent Document 4). However, these cationic polymers are wrinkled when applied to the hair and have insufficient adhesion to the hair, so it is difficult to remain on the hair when washing the hair. Has the disadvantage of not being expressed.

Japanese Examined Patent Publication No. 56-4533 Japanese National Patent Publication No. 11-500417 Japanese Patent Application Laid-Open No. 08-231649 Japanese Patent Laid-Open No. 06-107526

  The present invention has been made in view of the above-described conventional technology, and imparts flexibility without giving the hair an irritating effect when used, and maintains the flexibility without giving a feeling of friction to the hair after washing. It is an object to provide cosmetics.

  The present invention relates to a compound of formula (I):

Wherein R ¹ is a hydrogen atom or a methyl group, R ² is an alkylene group having 1 to 4 carbon atoms, R ³ and R ⁴ are each independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R ⁵ is An organic group, A represents an oxygen atom or —NH— group, and B ⁻ represents an anion)
The present invention relates to a cationic cosmetic comprising a base polymer obtained by polymerizing a monomer composition containing a monomer represented by general formula (1) as a main component.

  The cationic cosmetic of the present invention has an excellent effect of imparting flexibility without giving the hair an irritating effect during use, and maintaining the flexibility without giving a feeling of friction to the hair after washing. Therefore, the cationic cosmetic of the present invention can be suitably used as a hair cosmetic.

  The monomer represented by the formula (I) has a property of being easily adsorbed to keratin of hair. Therefore, the cationic cosmetic of the present invention containing a base polymer obtained by polymerizing a monomer composition containing the monomer is excellent in adhesion to hair and is used when washed after being used on hair. Since it tends to remain in the hair, it imparts excellent flexibility without giving the hair a feeling of friction.

In the formula (I), R ¹ represents a hydrogen atom or a methyl group. R ² represents an alkylene group having 1 to 4 carbon atoms. Among R ² , a methylene group, an ethylene group, an n-propylene group, and an isopropylene group are preferable.

R ³ and R ⁴ each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. Among these, a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, and an n-butyl group are preferable.

R ⁵ represents an organic group. Specific examples of the organic group include an alkyl group having 1 to 22 carbon atoms, an aryl group having 6 to 12 carbon atoms, and a carboxyalkylene group having 2 to 6 carbon atoms. Of these, a methyl group, an ethyl group, a benzyl group, and a carboxymethyl group are preferable.

A represents an oxygen atom or a —NH— group. B ⁻ represents an anion. B ^- Preferred examples of the alkyl chloride ion having 1 to 4 carbon atoms, a monovalent dialkyl sulfate ion carbon atoms in the alkyl group is 1-4, 6 to 8 carbon atoms aryl chloride ions, carbon atoms in the alkyl group Alkyl sulfate halides having 1 to 4 numbers, halogen ions, acetate ions, borate ions, citrate ions, tartaric acid ions, hydrogen sulfate ions, bisulfite ions, sulfate ions, phosphate ions, etc. may be mentioned. However, the present invention is not limited to such examples. Examples of the halogen atom in the halide include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. Examples of the halogen atom in the halogen ion include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. Among B-, alkyl chloride ions having 1 to 4 carbon atoms, monovalent dialkyl sulfate ions having 1 to 4 carbon atoms in the alkyl group, and aryl chloride ions having 6 to 8 carbon atoms are preferable.

  Specific examples of the monomer represented by the formula (I) include methyl chloride salt of N, N-dimethylaminoethyl (meth) acrylate, dimethyl sulfate salt of N, N-dimethylaminoethyl (meth) acrylate, N, N -Diethyl sulfate of dimethylaminoethyl (meth) acrylate, benzyl chloride of N, N-dimethylaminoethyl (meth) acrylate, methyl chloride of N, N-dimethylaminopropyl (meth) acrylate, N, N-dimethyl Aminopropyl (meth) acrylate dimethyl sulfate, N, N-dimethylaminopropyl (meth) acrylate diethyl sulfate, N, N-dimethylaminopropyl (meth) acrylate benzyl chloride salt, N, N-diethylaminoethyl ( Methyl chloride salt of meth) acrylate N, N-diethylaminoethyl (meth) acrylate dimethyl sulfate, N, N-diethylaminoethyl (meth) acrylate diethyl sulfate, N, N-diethylaminoethyl (meth) acrylate benzyl chloride salt, N, N-diethylamino Methyl chloride salt of propyl (meth) acrylate, dimethyl sulfate salt of N, N-diethylaminopropyl (meth) acrylate, diethyl sulfate salt of N, N-diethylaminopropyl (meth) acrylate, N, N-diethylaminopropyl (meth) acrylate Benzyl chloride salt,

Methyl chloride salt of N, N-dimethylaminoethyl (meth) acrylamide, dimethyl sulfate salt of N, N-dimethylaminoethyl (meth) acrylamide, diethyl sulfate salt of N, N-dimethylaminoethyl (meth) acrylamide, N, Benzyl chloride salt of N-dimethylaminoethyl (meth) acrylamide, methyl chloride salt of N, N-dimethylaminopropyl (meth) acrylamide, dimethyl sulfate salt of N, N-dimethylaminopropyl (meth) acrylamide, N, N- Dimethylaminopropyl (meth) acrylamide diethyl sulfate, N, N-dimethylaminopropyl (meth) acrylamide benzyl chloride, N, N-diethylaminoethyl (meth) acrylamide methyl chloride, N, N-diethylamino Dimethyl sulfate of chill (meth) acrylamide, diethyl sulfate of N, N-diethylaminoethyl (meth) acrylamide, benzyl chloride salt of N, N-diethylaminoethyl (meth) acrylamide, N, N-diethylaminopropyl (meth) acrylamide N, N-diethylaminopropyl (meth) acrylamide dimethyl sulfate, N, N-diethylaminopropyl (meth) acrylamide diethyl sulfate, N, N-diethylaminopropyl (meth) acrylamide benzyl chloride salt,

N- (meth) acryloyloxymethyl-N, N-dimethylammonium-α-N-carboxybetaine, N- (meth) acryloyloxyethyl-N, N-dimethylammonium-α-N-carboxybetaine, N- (meta ) Acryloyloxypropyl-N, N-dimethylammonium-α-N-carboxybetaine, N- (meth) acryloyloxymethyl-N, N-diethylammonium-α-N-carboxybetaine, N- (meth) acryloyloxyethyl -N, N-diethylammonium-α-N-carboxybetaine, N- (meth) acryloyloxypropyl-N, N-diethylammonium-α-N-carboxybetaine, and the like. A mixture of seeds or more can be used.

  In the present specification, “(meth) acryl” means “acryl” and / or “methacryl”.

  Among the monomers represented by formula (I), methyl chloride salt of N, N-dimethylaminoethyl (meth) acrylate, diethyl sulfate salt of N, N-dimethylaminoethyl (meth) acrylate and N, N-dimethyl A methyl chloride salt of aminopropyl (meth) acrylamide is preferable, and these can be used alone or in admixture of two or more.

  The monomer composition may contain a monomer other than the monomer represented by formula (I) as long as the object of the present invention is not impaired.

  Representative examples of monomers other than the monomer represented by formula (I) include monomers having an ethylenically unsaturated double bond. A monomer having an ethylenically unsaturated double bond can be appropriately selected and used depending on the use of the cosmetic base of the present invention and the required physical properties.

  Representative examples of the monomer having an ethylenically unsaturated double bond include (meth) acrylic acid ester having 1 to 24 carbon atoms in the ester moiety, monofunctional monomer, (meth) acrylic polyfunctional monomer, and the like. These can be used alone or in admixture of two or more.

  Specific examples of the (meth) acrylic acid ester having 1 to 24 carbon atoms in the ester moiety include (meth) acrylic acid; (meth) acrylic acid alkali metal salt; (meth) acrylic acid ammonium salt; (meth) acrylic acid Methyl, ethyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, neopentyl (meth) acrylate, hexyl (meth) acrylate, (meth ) Octyl acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, cetyl (meth) acrylate, cyclohexyl (meth) acrylate, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, ( Hydroxybutyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, ethyl carbitol (meth) acrylate, methoxy (meth) acrylate Examples thereof include ethyl, methoxybutyl (meth) acrylate, and benzyl (meth) acrylate, and these can be used alone or in admixture of two or more.

  Specific examples of the monofunctional monomer include (meth) acrylamide; N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, N-propyl (meth) acrylamide, N-isopropyl (meth) acrylamide, N-butoxymethyl (Meth) acrylamide, Nt-butyl (meth) acrylamide, N-octyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, (meth) acryloylmorpholine, N , N-dimethylaminoethyl (meth) acrylate and its tertiary salt, N, N-dimethylaminopropyl (meth) acrylate and its tertiary salt, N, N-diethylaminoethyl (meth) acrylate and its tertiary salt, N , N-diethylaminopropyl (meth) acrylate and its tertiary salt, Nt-butyl Ruaminoethyl (meth) acrylate and its tertiary salt, Nt-butylaminopropyl (meth) acrylate and its tertiary salt, N, N-dimethylaminoethyl (meth) acrylamide and its tertiary salt, N, N-dimethyl Aminopropyl (meth) acrylamide and its tertiary salt, N, N-diethylaminoethyl (meth) acrylamide and its tertiary salt, N, N-diethylaminopropyl (meth) acrylamide and its tertiary salt, diacetone (meth) acrylamide, Styrene, itaconic acid, methyl itaconate, ethyl itaconate, vinyl acetate, vinyl propionate and the like can be mentioned, and these can be used alone or in admixture of two or more.

  Specific examples of the (meth) acrylic polyfunctional monomer include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, 2-n-N-butyl-2-ethyl-1,3-propanediol di (meth) acrylate, tripropylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, methylenebisacrylamide, trimethylolpropane tri Examples include (meth) acrylic polyfunctional monomers such as (meth) acrylate and pentaerythritol tri (meth) acrylate, and these monomers can be used alone or in admixture of two or more.

  The monomer composition is mainly composed of the monomer represented by the formula (I). Here, the main component of the monomer represented by the formula (I) is 50% by weight or more, preferably 60% by weight, more preferably 80% by weight of the monomer represented by the formula (I) in the monomer composition. It means containing above. The content of the monomer represented by the formula (I) in the monomer composition is preferably from the viewpoint of maintaining flexibility without giving the hair an irritating feeling during the use and without giving a feeling of friction to the hair after washing. 60 to 100% by weight, more preferably 80 to 99% by weight.

  The content of the monomer other than the monomer represented by the formula (I) in the monomer composition does not give the hair an irritating effect during use, does not give the hair a friction feeling after washing, and maintains a rich flexibility From 0 to 20% by weight is preferable. Further, from the viewpoint of sufficiently expressing the effect of using a monomer other than the monomer represented by formula (I), the content of the monomer represented by formula (I) in the monomer composition is preferably 50 to 100. % By weight, more preferably 60 to 100% by weight, still more preferably 80 to 99% by weight, and the content of monomers other than the monomer represented by formula (I) is preferably 0 to 50% by weight, more preferably Is 0 to 40% by weight, more preferably 1 to 20% by weight.

  The base polymer can be easily obtained, for example, by subjecting the monomer composition to solution polymerization in a solvent such as water or an organic solvent. More specifically, the polymerization can be performed by sufficiently dissolving the monomer composition in a solvent and adding a polymerization initiator while heating and stirring as necessary.

  There are no particular limitations on the type of organic solvent, but since the present invention is a cosmetic, for example, purified water, ethyl alcohol, isopropyl alcohol, benzyl alcohol, phenylethyl alcohol, ethylene glycol, propylene glycol, ethylene glycol monoalkyl. Ether, diethylene glycol monoalkyl ether, triethylene glycol monoalkyl ether, ethylene glycol monomethyl ether, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether and the like are preferable.

  The amount of the solvent is not particularly limited, but it is usually preferable to adjust the concentration of the monomer composition in the solution in which the monomer composition is dissolved to be about 10 to 80% by weight. When the concentration of the monomer composition exceeds 15% by weight, the monomer composition can be divided and polymerized while gradually added from the viewpoint of avoiding sudden heat generation during the polymerization. preferable.

  The polymerization initiator is not particularly limited as long as it is generally used for solution polymerization. Specific examples of the polymerization initiator include azo compounds such as azobisisobutyronitrile, organic peroxides such as benzoyl peroxide, and persulfate compounds such as ammonium persulfate. It is not limited to.

  The polymerization temperature varies depending on the type of polymerization initiator used and the like, but usually it is preferably around the 10-hour half-life temperature of the polymerization initiator.

  The polymerization atmosphere is preferably an inert atmosphere such as nitrogen gas or argon gas.

  The polymerization time varies depending on the type and amount of the monomer used, the polymerization temperature, etc., and thus cannot be determined unconditionally. However, from the viewpoint of avoiding remaining unreacted monomers and from the viewpoint of production efficiency, the polymerization time is usually 5 to 5. It is preferably about 20 hours.

  Thus, the viscosity average molecular weight of the base polymer obtained by polymerizing the monomer composition is preferably 1000 to 5000000, but considering the point that the use is a cosmetic, more preferably 10,000 to 2000000, Preferably it is 10,000 to 1,000,000.

  The reaction mixture obtained by polymerizing the monomer composition may be used as it is in cosmetics, may be used in cosmetics after diluting the reaction mixture with a solvent, or produced from the reaction mixture. An aqueous solution of a base polymer obtained by isolating the base polymer and dissolving the base polymer with water may be used in cosmetics.

  Since the content of the base polymer in the cosmetic of the present invention varies depending on the type of the cosmetic and the like and cannot be determined unconditionally, it is preferably determined appropriately according to the type of the cosmetic. For example, when the cosmetic of the present invention is used as a cosmetic for hair such as shampoo, hair rinse, hair conditioner, hair treatment, etc., the content of the base polymer in the cosmetic (resin solid content, hereinafter the same) is: Usually, it is preferably 0.01 to 15% by weight, more preferably 0.05 to 10% by weight.

  In the cationic cosmetic of the present invention, generally used components such as a surfactant, a chelating agent, a fragrance, and a coloring agent may be appropriately used. Examples of the surfactant include an anionic surfactant, a betaine surfactant, an amphoteric surfactant, a cationic surfactant, and a nonionic surfactant.

  Since the base polymer used in the present invention is cationic, it tends to be inferior in compatibility with an anionic surfactant. In this case, the anionic surfactant can enhance the compatibility between the base polymer and the anionic surfactant by using it together with the nonionic surfactant as a solubilizing agent.

  Examples of the anionic surfactant include alkyl sulfate, alkyl ether sulfate, alkyl sulfonate, alkyl lauryl sulfonate, alkyl succinate, alkyl sulfo succinate, N-alcoyl sarcosinate, acyl taurate, acyl Isethionate, alkyl phosphate, alkyl ether phosphate, alkyl ether carboxylate, α-olefin sulfonate, triethanolamine alkali metal salt whose alkali metal is sodium or potassium, triethanolamine alkali whose alkaline earth metal is magnesium or calcium Alkyl ether in which the number of added moles of earth metal salt, triethanolamine ammonium salt, ethylene oxide or propylene oxide is 1-10. Tersulfate, alkyl ether phosphate having an addition mole number of ethylene oxide or propylene oxide of 1 to 10, alkyl ether carboxylate having an addition mole number of ethylene oxide or propylene oxide of 1 to 10, sodium lauryl sulfate, ammonium lauryl sulfate, Sodium lauryl ether sulfate, ammonium lauryl ether sulfate, sodium lauryl oxyethylene sulfate, sodium lauroylmethylalanine, potassium myristate, potassium palm oil fatty acid, sodium lauroyl sarcosinate, sodium oleyl succinate, ammonium lauryl sulfosuccinate, sodium dodecyl Benzol sulfonate, triethanolamine dodecyl benzol sulfonate, etc. These may be used alone or in combination of two or more.

  Examples of the betaine surfactants include alkylbetaines, alkylamidopropylbetaines, alkylsulfobetaines, cocodimethylsulfopropylbetaines, lauryldimethylaminoacetic acid betaines, laurylbetaines, and cocamidopropylbetaines. These can be used alone or in admixture of two or more.

  Examples of amphoteric surfactants include alkyl glycinate, alkyl carboxy glycinate, alkyl amphoacetate, alkyl amphopropionate, alkyl amphodiacetate, alkylamphodipropionate, sodium lauroyl sarcosine, sodium cocoamphoacetate, sodium cocamphoproprote. Pionate etc. are mentioned, These can be used individually or in mixture of 2 or more types, respectively.

  Cationic surfactants can be suitably used mainly for cosmetics such as rinses, conditioners and treatments.

  Examples of the cationic surfactant include 4 such as cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, diallyldimethylammonium chloride, dicocoyldimethylammonium chloride, distearyldimethylammonium chloride, stearyldimethylbenzylammonium chloride. A class ammonium compound etc. are mentioned, These can be used individually or in mixture of 2 or more types, respectively.

  Nonionic surfactants can also be used as solubilizers to increase the solubility of anionic surfactants and the like.

  Examples of nonionic surfactants include sorbitan fatty acid esters such as sorbitan laurate, sorbitan stearate, sorbitan isostearate, and sorbitan oleate; glyceryl monoundecylenate, glyceryl myristate, glyceryl monostearate, glyceryl monoisostearate, Glycerin fatty acid esters such as glyceryl dioleate and glyceryl distearate; polyglycerin fatty acid esters such as decaglyceryl tristearate, decaglyceryl pentastearate, decaglyceryl decastearate, decaglyceryl decaisostearate, decaglyceryl dekaoleate; monostearin Acid polyoxyethylene (5) glyceryl [The numbers in parentheses indicate the number of moles of reoxyethylene added. The same shall apply hereinafter), polyoxyethylene glyceryl fatty acid esters such as polyoxyethylene (15) glyceryl monostearate, polyoxyethylene (5) glyceryl monooleate, polyoxyethylene (15) glyceryl monooleate; 6 in the alkyl chain Aliphatic alcohols having ˜20 carbon atoms, reaction products of alkylphenols with at least one of ethylene oxide and propylene oxide, alkylamine oxides, monoalkylalkanolamides, dialkylalkanolamides, polyethylene glycol fatty acid esters, ethoxylated fatty acid amides , Alkyl polyglycoside, sorbitan ether ester, sorbitan stearate, sorbitan oleate, etc., and these may be used alone or in combination of two or more. It is possible to have.

  When the anionic surfactant, betaine surfactant and amphoteric surfactant are used alone or in combination of two or more as the surfactant, the total content of these surfactants in the cosmetic is determined by the detergency. From the viewpoint of enhancing foaming power, preferably 0.01% by weight or more, more preferably 0.1% by weight or more, and from the viewpoint of solubility, preferably 70% by weight or less, more preferably 40% by weight. It is as follows.

  When a cationic surfactant is used as the surfactant, the content of the cationic surfactant in the cosmetic is preferably 0.01% by weight or more, more preferably from the viewpoint of imparting a slipperiness and a moist feeling. From the viewpoint of reducing stickiness, it is preferably 30% by weight or less, and more preferably 20% by weight or less.

  When a nonionic surfactant is used as the surfactant, the content of the nonionic surfactant in the cosmetic is preferably 0 from the viewpoint of improving the solubility and stability with other surfactants. From the viewpoint of suppressing stickiness, it is preferably 50% by weight or less, more preferably 15% by weight or less.

  When the cationic cosmetic of the present invention is used, for example, as a shampoo containing a base polymer, a surfactant, etc., it imparts suitable slipping feeling (friction feeling), flexibility and the like to hair (head hair). be able to.

  The balance of the cationic cosmetic of the present invention is a solvent. Examples of the solvent include purified water, ethanol, isopropanol, benzyl alcohol, phenylethyl alcohol, ethylene glycol, propylene glycol, ethylene glycol monoalkyl ether, diethylene glycol monoalkyl ether, triethylene glycol monoalkyl ether, glycerin, 1,3- Butylene glycol etc. are mentioned, These can be used individually or in mixture of 2 or more types, respectively.

  In addition, the cosmetic of the present invention can contain, for example, an appropriate amount of a compatibilizer for a surfactant, a pH adjuster, a film forming agent, a protein, a fragrance, a pigment, a preservative, and the like.

  Examples of the compatibilizer for the surfactant include fatty alcohols such as cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, behenyl alcohol, and glycerin. The content of the compatibilizer in the cosmetic is usually 0.01 to 20% by weight, preferably 1 to 15% by weight.

  Examples of the pH adjuster include lauric acid, palmitic acid, stearic acid, isostearic acid, and behenic acid. The content of the pH adjusting agent in the cosmetic is preferably adjusted so that the cosmetic has a desired pH. The content of the pH adjusting agent in the cosmetic is preferably adjusted so that the pH of the cosmetic of the present invention is 2 to 12, preferably 3 to 10, for example. Usually, the content of the pH adjuster in the cosmetic is preferably about 0.01 to 20% by weight, more preferably about 1 to 15% by weight.

  Examples of the film forming agent include silicone derivatives such as dimethylpolysiloxane, methylphenylpolysiloxane, and amino-modified silicone. Since the silicone derivative forms a thin film on the surface of the hair, it has an advantage of imparting a smooth finish to the hair. Representative examples of silicone derivatives include Dow Corning Co., Ltd., product number: DC 929, Toray Dow Corning Silicone Co., Ltd., product number: SM8702C. The content of the film forming agent in the cosmetic is 0.01 to 5% by weight, preferably 0.1 to 3% by weight.

  Proteins have the property of giving hair and skin a moist and smooth finish. Examples of the protein include keratin, elastin, collagen, lactoferrin, casein, α (β) -lactalbumin, globulins and egg white albumin, wheat, soybean, silk and the like. The protein content in the cosmetic is desirably 0.01 to 5% by weight, preferably 0.05 to 3% by weight.

  The cosmetic of the present invention contains a base polymer obtained by polymerizing a monomer composition containing the monomer represented by the formula (I) as a main component, so The effect of imparting flexibility without giving a hair and maintaining the flexibility without giving a feeling of friction to the hair after washing is achieved.

  Therefore, the cationic cosmetic of the present invention can be suitably used as a body shampoo, body rinse, etc., as well as hair cosmetics such as shampoo, hair rinse, hair conditioner and hair treatment. In addition, as a form of cosmetics, a cream, an emulsion, a thickening lotion, a wax etc. are mentioned, for example.

  Next, the present invention will be described in more detail based on examples, but the present invention is not limited to such examples.

Production Example 1
In a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen introduction tube and a stirrer, 90 g of methyl chloride salt of N, N-dimethylaminoethyl acrylate (hereinafter referred to as DMA-MC), acrylamide (hereinafter referred to as AAm). After adding 10 g of purified water and 200 g of purified water, 0.1 g of azobisisobutyronitrile was further added, and a polymerization reaction was carried out at a temperature of 78 to 80 ° C. for 6 hours under a nitrogen stream while heating and stirring.

  After cooling the obtained reaction mixture to 50 ° C., 200 g of purified water was added and stirred until a uniform solution was obtained, thereby obtaining a base polymer solution having a base polymer content of 20% by weight. It was 800,000 when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with the Ubbelohde viscometer.

Production Example 2
In a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen inlet tube and a stirrer, 95 g of N, N-dimethylaminoethyl methacrylate methyl chloride salt (hereinafter referred to as DMMA-MC), N, N-dimethyl After adding 3 g of aminoethyl acrylate (hereinafter referred to as DMA), 2 g of diacetone acrylamide (hereinafter referred to as DAAm) and 250 g of purified water, dimethyl 2,2′-azobis (2-methylpropionate) [ Wako Pure Chemical Industries, Ltd., product number: V-601] 0.5 g was added, and the polymerization reaction was carried out at a temperature of 68 to 72 ° C. for 8 hours under a nitrogen stream while heating and stirring.

  After cooling the obtained reaction mixture to 50 ° C., 200 g of purified water was added and stirred until a uniform solution was obtained, thereby obtaining a base polymer solution having a base polymer content of 20% by weight. It was 700,000 when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with the Ubbelohde viscometer.

Production Example 3
In a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen introduction tube and a stirrer, 90 g of diethyl sulfate (hereinafter referred to as DMMA-DS) of N, N-dimethylaminoethyl methacrylate and N-vinylpyrrolidone ( (Hereinafter referred to as NVP) 10 g, ethanol 200 g, and azobisisovaleronitrile 0.05 g were added, and the polymerization reaction was carried out for 8 hours at a temperature of 75 to 80 ° C. under a nitrogen stream while heating and stirring.

  After cooling the obtained reaction mixture to 50 ° C., 200 g of ethanol was added and stirred until a uniform solution was obtained, thereby obtaining a base polymer solution having a base polymer content of 20% by weight. It was 100,000 when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with the Ubbelohde viscometer.

Production Example 4
In a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen introduction tube and a stirrer, 90 g of DMMA-DS, 10 g of NVP, 200 g of ethanol and 0.05 g of azobisisovaleronitrile were added, and the mixture was heated and stirred under a nitrogen stream. The polymerization reaction was carried out at a temperature of 75 to 80 ° C. for 8 hours.

  After cooling the obtained reaction mixture to 50 ° C., 200 g of ethanol was added and stirred until a uniform solution was obtained, thereby obtaining a base polymer solution having a base polymer content of 20% by weight. It was 500,000 when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with the Ubbelohde viscometer.

Production Example 5
In a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen inlet tube and a stirrer, 30 g of DMA-MC, 55 g of methyl chloride salt of N, N-diethylaminopropylmethacrylamide (hereinafter referred to as DMAPMA-MC), 10 g of DMA, 5 g of AAm, 5 g of butyl methacrylate (hereinafter referred to as BMA), 100 g of ethanol and 2,2′-azobis (2-methylpropionamidine) dihydrochloride as a polymerization initiator (product number: V-50, manufactured by Wako Pure Chemical Industries, Ltd.) 0.1 g was added, and the polymerization reaction was carried out at a temperature of 75 to 80 ° C. for 8 hours under a nitrogen stream while heating and stirring.

  After cooling the obtained reaction mixture to 50 ° C., 300 g of ethanol was added and stirred until a uniform solution was obtained, thereby obtaining a base polymer solution having a base polymer content of 20% by weight. It was 150,000 when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with the Ubbelohde viscometer.

Production Example 6
After adding 20 g of DMA-MC, 3.3 g of NVP, and 200 g of purified water to a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen inlet tube and a stirrer, 0.1 g of azobisisobutyronitrile was further added. In addition, the polymerization reaction was performed for 30 minutes at a temperature of 78 to 80 ° C. under a nitrogen stream while heating and stirring. Thereafter, 60 g of DMA-MC and 16.7 g of NVP were dropped over 2 hours, and then a polymerization reaction was performed for 6 hours.

  After cooling the obtained reaction mixture to 50 ° C., 200 g of purified water was added and stirred until a uniform solution was obtained, thereby obtaining a base polymer solution having a base polymer content of 20% by weight. It was 1.2 million when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with an Ubbelohde viscometer.

Production Example 7
In a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen inlet tube and a stirrer, 5 g of DMA and 200 g of purified water were added, and then 0.1 g of azobisisobutyronitrile was further added, while stirring with heating. The polymerization reaction was performed for 30 minutes at a temperature of 78 to 80 ° C. under a nitrogen stream. Thereafter, 60 g of DMA-MC and 35 g of DMA were dropped over 2 hours, and then a polymerization reaction was performed for 6 hours.

  After cooling the obtained reaction mixture to 50 ° C., 200 g of purified water was added and stirred until a uniform solution was obtained, thereby obtaining a base polymer solution having a base polymer content of 20% by weight. It was 1.4 million when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with the Ubbelohde viscometer.

Production Example 8
In a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen introduction tube and a stirrer, 99 g of DMMA-DS, 1 g of NVP, 200 g of ethanol and 0.05 g of azobisisovaleronitrile were added, and the mixture was heated and stirred under a nitrogen stream. The polymerization reaction was carried out at a temperature of 75 to 80 ° C. for 8 hours.

  After cooling the obtained reaction mixture to 50 ° C., 200 g of ethanol was added and stirred until a uniform solution was obtained, thereby obtaining a base polymer solution having a base polymer content of 20% by weight. It was 900,000 when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with the Ubbelohde viscometer.

Comparative production example 1
After adding 20 g of DMMA-DS, 80 g of NVP and 400 g of purified water into a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen inlet tube and a stirrer, dimethyl 2,2′-azobis (2-methylpropio) Nate) [Product number: V-601, manufactured by Wako Pure Chemical Industries, Ltd.] 0.1 g was added, and a polymerization reaction was performed at a temperature of 68 to 72 ° C. for 8 hours under a nitrogen stream while heating and stirring.

  The obtained reaction mixture contained 20% by weight of the base polymer. After cooling the reaction mixture to 50 ° C., 300 g of ethanol was added and stirred until a uniform solution was obtained, so that the base polymer was contained. A base polymer solution with an amount of 20% by weight was obtained. It was 500,000 when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with the Ubbelohde viscometer.

Comparative production example 2
Into a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen inlet tube and a stirrer, 15 g of DMA-MC, 85 g of AAm and 100 g of ethanol were charged and uniformly dissolved, and then half of the resulting monomer solution was extracted. Then, 0.05 g of azobisisovaleronitrile was added, and the polymerization reaction was performed at a temperature of 75 to 85 ° C. under a nitrogen stream while stirring with heating.

  Next, the extracted monomer solution was dropped into the reaction vessel over 2 hours. After completion of the dropping, a polymerization reaction was carried out for 8 hours.

  After cooling the obtained reaction mixture to 50 ° C., 300 g of ethanol was added and stirred until a uniform solution was obtained, thereby obtaining a base polymer solution having a base polymer content of 20% by weight. It was 200,000 when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with the Ubbelohde viscometer.

Comparative production example 3
In a 1 L reactor equipped with a reflux condenser, a thermometer, a nitrogen inlet tube and a stirrer, 45 g of DMAPAA-DS and 15 g of AAm, 40 g of NVP, 300 g of purified water and 2,2′-azobis (2-methylpropionamidine) dihydrochloride [Wako Pure Chemical Industries, Ltd., product number: V-50] 0.5 g was added, and a polymerization reaction was carried out at a temperature of 75 to 80 ° C. for 8 hours under a nitrogen stream while heating and stirring.

  After cooling the obtained reaction mixture to 50 ° C., 100 g of purified water was added and stirred until a uniform solution was obtained, thereby obtaining a base polymer solution having a base polymer content of 20% by weight. It was 300,000 when the viscosity average molecular weight of the base polymer contained in the obtained base polymer solution was measured with the Ubbelohde viscometer.

Example 1 and Comparative Example 1
The content of the base polymer obtained in each production example shown in Table 1 or each comparative production example is 0.2% by weight, the content of the amphoteric surfactant shown in Table 1 is 10.0% by weight, and the balance is The cosmetics for hair were obtained by mixing each component so that it might become 89.8 weight% of purified water.

  The physical properties of the obtained cosmetic for hair were examined according to the following method. The results are shown in Table 1.

(1) Friction sensation For measurement of the friction sensation, commercially available human hair [manufactured by Beaulux Co., Ltd., root alignment] was used. After washing the human hair with a commercially available shampoo, 200 hairs were arranged in a width of 2 cm and fixed at a length of 5 cm to prepare a hair sample.

(a) Measurement of friction feeling (MIU) of hair sample before application The friction feeling (MIU) of the hair sample was measured three times with a friction feeling tester [manufactured by Kato Tech Co., Ltd., product number: KRS-SE], and the average The value was determined.

(B) Measurement of friction feeling (MIU) of hair sample after shampooing The hair sample of (a) was lightly washed with water, and 0.1 g of hair cosmetic obtained in each Example or each Comparative Example was applied, After scrubbing, it was rinsed with running water of 5 L / min for 1 minute and dried with hot air at 50 ° C. for 1 hour. The feeling of friction (MIU) of the hair sample after drying was measured three times to determine the average value.

(C) Next, the formula:
[Friction feeling] = [Friction feeling of hair sample after washing (MIU)] ÷ [Friction feeling of hair sample after washing (MIU)]
Each of the friction feelings was examined and evaluated based on the following evaluation criteria. In addition, it shows that there is no friction feeling and it is excellent, so that the numerical value of a friction feeling is small.

〔Evaluation criteria〕
◎: MIU value is less than 0.8 ○: MIU value is 0.8 or more and less than 0.9 Δ: MIU value is 0.9 or more and less than 1.0 ×: MIU value is 1.0 or more

(2) Flexibility For the measurement of flexibility, commercially available human hair [manufactured by Beaulux Co., Ltd., root alignment] was used. These human hairs were aligned to a length of 30 cm and weighed 2 g, washed with a commercially available shampoo, and then dried to prepare evaluation hair bundles.

  A 1% by weight aqueous solution of the hair cosmetic obtained in each example or each comparative example was prepared, 0.1 g of the aqueous solution was uniformly applied to the evaluation hair bundle, and dried with hot air at 50 ° C. for 1 hour. To prepare a test sample.

(a) Flexibility after application The feel of the test sample obtained above was examined with fingers and evaluated based on the following evaluation criteria.

(B) Flexibility after hair washing After the test sample obtained above was washed with flowing water of 5 L / min for 1 minute and then dried at 50 ° C. for 1 hour, the feel of the test sample was examined with fingers, Evaluation based on the evaluation criteria.

〔Evaluation criteria〕
A: Very high flexibility.
○: High flexibility.
Δ: Low flexibility.
X: Flexibility is very low.

  From the results shown in Table 1, the hair cosmetics obtained in each of the examples in which the amphoteric surfactant is used have a friction feeling as compared with the hair cosmetics obtained in each comparative example. It can be seen that the hair is imparted with small and excellent flexibility. Therefore, the cosmetics for hair obtained in each example can be suitably used as a shampoo, for example.

Example 2 and Comparative Example 2
The content of the base polymer obtained in each production example shown in Table 2 or each comparative production example is 0.2% by weight, the content of the betaine surfactant shown in Table 2 is 10.0% by weight, and the balance The hair cosmetics were obtained as the hair cosmetics by mixing the components so that the water content was 89.8% by weight. The physical properties of the obtained hair cosmetic were examined in the same manner as in Example 1. The results are shown in Table 2.

  From the results shown in Table 2, the hair cosmetics obtained in each of the examples in which the betaine-based surfactant is used are compared with the hair cosmetics obtained in the respective comparative examples. It can be seen that the hair is small and imparts excellent flexibility to the hair.

Example 3 and Comparative Example 3
The content of the base polymer obtained in each production example shown in Table 3 or each comparative production example is 0.2% by weight, the content of the anionic surfactant shown in Table 3 is 10.0% by weight, and the balance Each component was mixed so that the amount of water became 89.8% by weight of purified water to obtain a cosmetic for hair. The physical properties of the obtained hair cosmetic were examined in the same manner as in Example 1. The results are shown in Table 3.

  From the results shown in Table 3, the hair cosmetics obtained in each of the examples in which an anionic surfactant was used were compared with the hair cosmetics obtained in each of the comparative examples. It can be seen that the hair is small and imparts excellent flexibility to the hair.

Example 4 and Comparative Example 4
The content of the base polymer obtained in each production example shown in Table 4 or each comparative production example is 0.2% by weight, the content of the cationic surfactant shown in Table 4 is 10.0% by weight, and the balance Each component was mixed so that the amount of water became 89.8% by weight of purified water to obtain a cosmetic for hair. The physical properties of the obtained hair cosmetic were examined in the same manner as in Example 1. The results are shown in Table 4.

  From the results shown in Table 4, the hair cosmetics obtained in each of the examples in which the cationic surfactant is used are more sensitive to friction than the hair cosmetics obtained in each comparative example. It can be seen that the hair is small and imparts excellent flexibility to the hair. Therefore, the cosmetics obtained in each example can be suitably used as, for example, rinses and treatments.

Example 5 and Comparative Example 5
The content of the base polymer obtained in each production example shown in Table 5 or each comparative production example is 0.2% by weight, the content of the nonionic surfactant shown in Table 5 is 10.0% by weight, and Each component was mixed so that the balance was 89.8% by weight of purified water to obtain a cosmetic for hair. The physical properties of the obtained hair cosmetic were examined in the same manner as in Example 1. The results are shown in Table 5.

  From the results shown in Table 5, the hair cosmetics obtained in each example can use a nonionic surfactant as a solubilizer, and the hair cosmetics obtained in each comparative example. In contrast, it can be seen that the frictional feeling is small and excellent flexibility is imparted to the hair. Therefore, the cosmetics for hair obtained in each example can be suitably used as shampoo, rinse and the like.

  From the above results, all the cosmetics obtained in each example impart flexibility without giving the hair a harshness at the time of use, and give flexibility without giving a feeling of friction to the hair even after washing. You can see that

Example 6 (Preparation of shampoo)
A shampoo was prepared by mixing the following components.
(Component) (wt%)
Cocamidopropyl betaine 30.00
Polyoxyethylene alkyl (12,13) ether sodium sulfate (3E.O.) 30.00
Purified water 28.75
1,3-butylene glycol 5.00
Base polymer obtained in Production Example 2 3.00
Palm oil fatty acid diethanolamide 2.00
Polyoxyethylene (13) oleyl ether 0.50
Fragrance [Hasegawa Fragrance Co., Ltd., product number: THP-11176] 0.50
Methyl paraoxybenzoate 0.10
Phenoxyethanol 0.10
Edetate disodium 0.05
Total 100.00

  Next, the physical properties of the obtained shampoo were examined in the same manner as in Example 1. As a result, the friction feeling, the flexibility after application, and the flexibility after washing the hair were all evaluated as ◎.

Example 7 (Preparation of shampoo)
A shampoo was prepared by mixing the following components.
(Component) (wt%)
Purified water 60.00
Sodium lauryl sulfate 12.00
Sodium cocoamphoacetate 10.00
Sorbitan oleate 10.00
Cocoyl glutamine triethanolamine [Hereinafter, triethanolamine is referred to as TEA] 3.00
Ammonium dodecylbenzene sulfonate 2.00
Oleic acid TEA 1.70
Base polymer obtained in Production Example 1 0.80
Sodium silicate 0.50
Total 100.00

  Next, the physical properties of the obtained shampoo were examined in the same manner as in Example 1. As a result, the friction feeling, the flexibility after application, and the flexibility after washing the hair were all evaluated as ◎.

Example 8 (Preparation of shampoo)
A shampoo was prepared by mixing the following components.
(Component) (wt%)
Purified water 55.00
Stearic acid 13.00
Sodium tetradecenesulfonate 12.00
Sorbitan stearate 12.00
Cocoa glutamic acid TEA 3.00
Ammonium dodecylbenzene sulfonate 2.50
Glycol stearate 1.70
Polymer base obtained in Production Example 2 0.50
Olive oil 0.30
Total 100.00

  Next, the physical properties of the obtained shampoo were examined in the same manner as in Example 1. As a result, the friction feeling, the flexibility after application, and the flexibility after washing the hair were all evaluated as ◎.

Example 9 (rinse preparation)
A rinse was prepared by mixing the following components.
(Component) (wt%)
Purified water 82.05
Cetyltrimethylammonium chloride 5.00
Octyldodecanol 4.70
Ethylene glycol distearate 3.00
Cetanol 2.80
Base polymer obtained in Production Example 1 1.00
Fragrance [Hasegawa Fragrance Co., Ltd., trade name: THP-11176] 0.50
Squalane 0.30
Macadamia nut oil 0.30
POE (40) Cetyl ether 0.15
Phenoxyethanol 0.10
Methyl paraoxybenzoate 0.10
Total 100.00

  Next, the physical properties of the resulting rinse were examined in the same manner as in Example 1. As a result, the friction feeling, the flexibility after application, and the flexibility after washing the hair were all evaluated as ◎.

Example 10 (Preparation of rinse)
A rinse was prepared by mixing the following components.
(Component) (wt%)
Purified water 93.00
Cetanol 2.00
Sorbitan oleate 2.00
Base polymer obtained in Production Example 2 1.50
Sunflower oil 1.00
Stearyltrimethylammonium chloride 0.50
Total 100.00

  Next, the physical properties of the resulting rinse were examined in the same manner as in Example 1. As a result, the friction feeling, the flexibility after application, and the flexibility after washing the hair were all evaluated as ◎.

Example 11 (Preparation of hair conditioner foam)
A hair conditioner foam was prepared by mixing the following components.
(Component) (wt%)
Purified water 83.40
Ethanol 10.00
Palm oil fatty acid amidopropyl betaine 3.50
Base polymer obtained in Production Example 3 1.00
Amino acid mixture [Ajinomoto Co., Ltd., trade name: Produ 400] 0.50
Glycerin 0.50
Polyethylene glycol 40 hydrogenated castor oil 0.50
Steartrimonium chloride 0.20
Fragrance [Hasegawa Fragrance Co., Ltd., product number: THP-11176] 0.20
Phenoxyethanol 0.10
Methyl paraoxybenzoate 0.10
Total 100.00

  Next, the physical properties of the obtained hair conditioner foam were examined in the same manner as in Example 1. As a result, the feeling of friction, the flexibility after application, and the flexibility after washing were all evaluated as ◎.

Example 12 (Preparation of hair conditioner)
A hair conditioner was prepared by mixing the following components.
(Component) (wt%)
Purified water 89.00
Behenyl alcohol 3.00
Suatephosphate amidoethyldiethylamine 2.00
Cetanol 2.00
Oleyl alcohol 1.00
Perfume 1.00
Dimethylpolysiloxane [manufactured by Dow Corning Co., Ltd., product number: DC929] 0.50
Base polymer obtained in Production Example 3 0.50
Liquid paraffin 0.50
Lactic acid 0.50
Total 100.00

  Next, the physical properties of the obtained hair conditioner were examined in the same manner as in Example 1. As a result, the friction feeling, the flexibility after application, and the flexibility after washing were all evaluated as ◎.

Example 13 (Preparation of hair treatment)
A hair treatment was prepared by mixing the following ingredients.
(Component) (wt%)
Purified water 88.00
Ethanol 5.00
Glycerin 3.00
Octyl palmitate 1.50
Base polymer obtained in Production Example 2 1.00
Collagen 1.00
Phenoxyethanol 0.50
Total 100.00

  Next, the physical properties of the obtained hair treatment were examined in the same manner as in Example 1. As a result, the friction feeling, the flexibility after application, and the flexibility after washing the hair were all evaluated as ◎.

Example 14 (Preparation of conditioning wax)
A conditioning wax was prepared by mixing the following components.
(Component) (wt%)
Purified water 86.18
Liquid paraffin 5.50
Cetostearyl alcohol 2.00
Behentrimonium chloride 1.20
Carnauba wax 1.20
Glycerin 1.00
Polyoxyethylene / methylpolysiloxane copolymer
[Toray Dow Corning Silicone Co., Ltd., product number: SH3771M] 0.80
Steareth-6 [Nippon Emulsion Co., Ltd., Emarex 606] 0.55
Base polymer obtained in Production Example 1 0.50
Fragrance [Hasegawa Fragrance Co., Ltd., product number: THP-11176] 0.30
POE (25) Cetyl ether 0.25
Polyacrylate 1 [Osaka Organic Chemical Co., Ltd., trade name:
Coscut GA468] 0.18
Lactic acid [purity 90%] 0.14
Methyl paraoxybenzoate 0.10
Butyl paraoxybenzoate 0.10
Total 100.00

  Next, the physical properties of the obtained conditioning wax were examined in the same manner as in Example 1. As a result, the feeling of friction, the flexibility after application, and the flexibility after washing the hair were all evaluated as ◎.

Example 15 (Preparation of moisturizing spray)
A moisturizing spray was prepared by mixing the following components.
(Component) (wt%)
Purified water 79.58
Ethanol 20.00
Base polymer obtained in Production Example 3 0.12
Methyl paraoxybenzoate 0.10
Polyoxyethylene / methylpolysiloxane copolymer
[Shin-Etsu Chemical Co., Ltd., product number: KF-6011] 0.08
Perfume [Hasegawa Perfume Co., Ltd., product number: THP-11179] 0.07
Polyoxyethylene (13) oleyl ether 0.05
Total 100.00

  Next, the physical properties of the obtained moisturizing spray were examined in the same manner as in Example 1. As a result, the friction feeling, the flexibility after application, and the flexibility after washing were all evaluated as ◎.

  The cationic cosmetics of the present invention can be suitably used as hair shampoos, body rinses, rinses, creams, treatments, etc. as well as hair cosmetics such as shampoos, hair rinses, hair conditioners and hair treatments. .

Claims (3)

Formula (I):

Wherein R ¹ is a hydrogen atom or a methyl group, R ² is an alkylene group having 1 to 4 carbon atoms, R ³ and R ⁴ are each independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R ⁵ is An organic group, A represents an oxygen atom or —NH— group, and B ⁻ represents an anion)
A cationic cosmetic comprising a base polymer obtained by polymerizing a monomer composition containing a monomer represented by general formula (1) as a main component.   The monomer represented by the formula (I) is a methyl chloride salt of N, N-dimethylaminoethyl (meth) acrylate, a diethyl sulfate salt of N, N-dimethylaminoethyl (meth) acrylate, or N, N-dimethylaminopropyl. The cationic cosmetic according to claim 1, which is at least one selected from the group consisting of methyl chloride salts of (meth) acrylamide.   The cationic cosmetic according to claim 1, wherein the content of the monomer represented by formula (I) in the monomer composition is 80 to 99% by weight.